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W. Gr. KENDRICK, OF WILMINGTON, DELAWARE l Letters Patent No. 67,77-0,dated August 13,1867.

RAILROAD-can HEATER.

TO ALL WHOM I'I MAY CONCERN:

Be it known that I, W. G. KENDRICK, of Wilmington, in the county ofNewcastle, and State of Delaware, have invented a new and usefulImprovement in Railroad-Car Heaters; and I do hereby4 declare thefollowing to be a full and exact description of the sama-reference beinghad to the accompanying drawings, which are made part ofthisspecitication, and in which--l Figure 1' is a` plan or top viewwitha portion of the floor of' the car'rexnoved.

Figure 2 is a. longitudinal sectional elevation showing the heatingapparatus and its connection with the car.

Figure 3 is a transverse section. Y

lSimilar letters f. reference indicate corresponding parts in theseveral figures.

This invention consists in a heating'apparatus suspended under thecentre of a car floor, in combination with certain pipes opening intothe outer air, and registers to receive the air entering lthrough. -andunder the car doors, for the purpose of heating the same, and diffusingit when heated through the car, as hereinafter fully described..

Airepresents the outer casing of the heating apparatus, B an innerconcentric casing, and D-the fire-box, the two-latter resting on aflange projecting inward from a cylindrical foot-piece attached to theouter casing A. The function ofthe inner casing'B is to assist inkeeping the heat from the fire-box in and the cold out. The productsofcombustio'n are carried off by the smoke pipe d. As soon as a fire isbuilt theairin the space between the tire-box and external casingbecomes heated and rises into the car.A To supply its place cold airenters from the pipes E, which receive it from theboxes Fou the underside of the car. The boxes F obtain their supplypartly from the pipes G,which pass up through the car at' the corners and out into the open air,being provided with mouths L, opening'straight forward in oppositedirections, which are covered with wire gauze to keep out everything butair, and partly from the registers I, situated just within the doors ofthe car at the ends thereof. It is on account of the air entering herethat the greatest diiculty is experienced in heatingV a -car with astove, as it spreads over the bottom of the vehicle and keeps the `feetof the passengers cold, while their heads and bodies maybe suilicientlywarm. But the register I being located close to the doors, and acurrentuthrough them being created by the operation of the heatingapparatus, all the air flowing in'under the doors while the train is inmotion is sucked through the registers, and passing through theheatingapparatus re-enters the ca y warmed. By this simple device I am enabledto effect a thorough heating of all parts of the carriage. a. rep esentsa register in the bottomvof the car through which the heated airascends. The perforated disk b within the register is attached to there-box cover, which isa solid cap fitting the fire-box closely.

' The perforations in the disk b arelfor convenience in removing thecover to admit fuel. Those portions of the.

pipes G- within the car are partially surrounded by casings K, which areperforated at the bottoms, as shown, with numerous small holes, and passout through the roof of the car.` Said casings are sul-mounted withhoods and serve to.conduct away, under the pressure of thesuperincumbent hot air, the cold air lying on the bottom of' the car.The hot air which rises from the heating apparatus to the ceiling owstoward both ends of the car and makes its exit forward by ventilation,and at the rear end byiboth door and ventilator. The boxes F areprovided with sliding doors in the under side, covering openings throughwhich the dirt from the registers may bezremoved. Pieces of wire gauzeare also stretched across the en ds of said boxes, near the upper endof,

the pipes E, for a similar purpose.

. Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is; 1. The registers I placed'just within thecar doors, and suitably connected with the heating apparatus for thepurpolfse of conducting all the cold air passing in under the doors tothe heating apparatus, that it may re-enter the car warmed, instead ofspreading over its bottom in a cold stratum, substantially as described.-1

2. The casings K, perforated `at their bottom, and opening into theouter air at their tops, as and for the purpose set,` forth. l 3.Theldreating apparatus, constructed with an intermediate casing, B, forthe purpose of .helping to keep the heat in and the cold out, asexplained.

W. e. KEN'DRICK.

Witnesses:

Jolmil T. ROBINSON, JAMES H. APPLEBY.

